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Q: Why does the ST_EXFORCE command report drift forces which do not look correct? REV 5.08 A: What you are getting with ST_EXFORCE is not wave drift, but first order wave excitation. You can look at wave drift raos in the Hydrodynamics Menu with V_MDRIFT…

Q: Why do my "Wave Drift" forces look strange? REV 7.05 A: You do not have a good panel model for diffraction. Remember, the drift force depends on the gradient of the velocity potential while the first order forces depend only on the potential. Thus…